442 OHIO EXPERIMENT STATION: BULLETIN 332 



PLATE LVI 



THE PIT-MAKING OAK SCALE 

 (Asterolecanium variolosum) 



Fig. 1. Oak twigs severely infested. The twig at the right is seen to be 

 rather deeply pitted where scales have been removed. 



Fig. 2. An English oak, Eden Park, Cincinnati, Ohio, in a dying condition 

 from the work of the pit-making oak scale. 



